#include <websocketpp/config/asio_no_tls_client.hpp>
#include <websocketpp/client.hpp>
 
#include <websocketpp/common/thread.hpp>
#include <websocketpp/common/memory.hpp>
 
#include <cstdlib>
#include <iostream>
#include <map>
#include <string>
#include <sstream>
 
typedef websocketpp::client<websocketpp::config::asio_client> client;
 
class connection_metadata {
public:
    typedef websocketpp::lib::shared_ptr<connection_metadata> ptr;
 
    connection_metadata(int id, websocketpp::connection_hdl hdl, std::string uri)
      : m_id(id)
      , m_hdl(hdl)
      , m_status("Connecting")
      , m_uri(uri)
      , m_server("N/A")
    {}
 
    void on_open(client * c, websocketpp::connection_hdl hdl) {
        m_status = "Open";
 
        client::connection_ptr con = c->get_con_from_hdl(hdl);
        m_server = con->get_response_header("Server");
    }
 
    void on_fail(client * c, websocketpp::connection_hdl hdl) {
        m_status = "Failed";
 
        client::connection_ptr con = c->get_con_from_hdl(hdl);
        m_server = con->get_response_header("Server");
        m_error_reason = con->get_ec().message();
    }
 
    friend std::ostream & operator<< (std::ostream & out, connection_metadata const & data);
private:
    int m_id;
    websocketpp::connection_hdl m_hdl;
    std::string m_status;
    std::string m_uri;
    std::string m_server;
    std::string m_error_reason;
};
 
std::ostream & operator<< (std::ostream & out, connection_metadata const & data) {
    out << "> URI: " << data.m_uri << "\n"
        << "> Status: " << data.m_status << "\n"
        << "> Remote Server: " << (data.m_server.empty() ? "None Specified" : data.m_server) << "\n"
        << "> Error/close reason: " << (data.m_error_reason.empty() ? "N/A" : data.m_error_reason);
 
    return out;
}
 
class websocket_endpoint {
public:
    websocket_endpoint () : m_next_id(0) {
        m_endpoint.clear_access_channels(websocketpp::log::alevel::all);
        m_endpoint.clear_error_channels(websocketpp::log::elevel::all);
 
        m_endpoint.init_asio();
        m_endpoint.start_perpetual();
 
        m_thread.reset(new websocketpp::lib::thread(&client::run, &m_endpoint));
    }
 
    int connect(std::string const & uri) {
        websocketpp::lib::error_code ec;
 
        client::connection_ptr con = m_endpoint.get_connection(uri, ec);
 
        if (ec) {
            std::cout << "> Connect initialization error: " << ec.message() << std::endl;
            return -1;
        }
 
        int new_id = m_next_id++;
        connection_metadata::ptr metadata_ptr(new connection_metadata(new_id, con->get_handle(), uri));
        m_connection_list[new_id] = metadata_ptr;
 
        con->set_open_handler(websocketpp::lib::bind(
            &connection_metadata::on_open,
            metadata_ptr,
            &m_endpoint,
            websocketpp::lib::placeholders::_1
        ));
        con->set_fail_handler(websocketpp::lib::bind(
            &connection_metadata::on_fail,
            metadata_ptr,
            &m_endpoint,
            websocketpp::lib::placeholders::_1
        ));
 
        m_endpoint.connect(con);
 
        return new_id;
    }
 
    connection_metadata::ptr get_metadata(int id) const {
        con_list::const_iterator metadata_it = m_connection_list.find(id);
        if (metadata_it == m_connection_list.end()) {
            return connection_metadata::ptr();
        } else {
            return metadata_it->second;
        }
    }
private:
    typedef std::map<int,connection_metadata::ptr> con_list;
 
    client m_endpoint;
    websocketpp::lib::shared_ptr<websocketpp::lib::thread> m_thread;
 
    con_list m_connection_list;
    int m_next_id;
};
 
int main() {
    bool done = false;
    std::string input;
    websocket_endpoint endpoint;
 
    while (!done) {
        std::cout << "Enter Command: ";
        std::getline(std::cin, input);
 
        if (input == "quit") {
            done = true;
        } else if (input == "help") {
            std::cout
                << "\nCommand List:\n"
                << "connect <ws uri>\n"
                << "show <connection id>\n"
                << "help: Display this help text\n"
                << "quit: Exit the program\n"
                << std::endl;
        } else if (input.substr(0,7) == "connect") {
            int id = endpoint.connect(input.substr(8));
            if (id != -1) {
                std::cout << "> Created connection with id " << id << std::endl;
            }
        } else if (input.substr(0,4) == "show") {
            int id = atoi(input.substr(5).c_str());
 
            connection_metadata::ptr metadata = endpoint.get_metadata(id);
            if (metadata) {
                std::cout << *metadata << std::endl;
            } else {
                std::cout << "> Unknown connection id " << id << std::endl;
            }
        } else {
            std::cout << "> Unrecognized Command" << std::endl;
        }
    }
 
    return 0;
}